[olddog]

Originally Posted by wolf k

I did try a stock setting of 12-14 deg initial and 38 total and it sure did not run well in the lower rpm ranges, may have been able to tune it out with jetting, but when I went back to 20 initial, it ran like it was injected car. I do not know why weber IR carbs like a lot of initial timing. Anybody have a theory? I have zero pre ignition with 10.5 compression and 87 octane fuel

My guess is that you are not running vacuum advance. Correct?